Improvement in teeth for carding-machines



c. HINDLE, J. c. MILTON & 0. ARNOLD.-

lmprovement in Teeth for Carding-Machines.

No. 129,662. Patentedluly23,l872.

UNITED STATES PATENT ()EFIoE.

CHARLES HINDLE, JOHN G. MILTON, AND OLIVER ARNOLD, OF woRoEsTER,

- MASSACHUSETTS.

IMPROVEMENT lN TEETH FOR CARDING-MACHINES.

Specification forming part of Letters Patent No. 129,662, dated July 23, 1872.

Specification describing certain Improvements in Oarding-Machine Teeth, invented by CHARLES HINDLE, JOHN G. MILTON, and

OLIVER ARNOLD, all of the city and county of Worcester, State of Massachusetts.

Our invention relates to the forming of a portion of the tooth near each point with an edge, so that a sharp point may be easily kept thereon, in combination with a round form of the rest of the tooth, for the purpose of combinin g the welLknown advantages of both the diamond or needle points and round crown. Its nature consists in making the wire from the points to the bend, or near there, of such form as to present an edge or angle on the front or under side, so that the grinding of the cards leaves the teeth with a fine triangular point, known as diamond or needle points, that part of the teeth being made of a V form, so that it shall present the desired edge in the right position, and retaining the round form as best adapted for the other part of the tooth.

In the drawing, Figure 1 shows a tooth embodying our invention, and Fig. 2 a section of the same at the line at y.

A is the crown, made of round wire, in the common form, the round part extending to the bends b b, and from there to the points or ends the wire is reduced to an edge on the side a c of each, a section of one being shown in Fig. 2. This formmay be given to portions of the wire, as it is fed into the setting-machine, by stamping or pressing it between two inclined surfaces, with the side (1 supported; or portions of the wire may be cut away, leaving the desired edge, either of which may be done by slight addition to the common card-setting machine.

We are aware that teeth for cards have been made of a V-shaped wire, presenting an edge in front their whole length, and of the same form throughout. These we do not claim.

Having described our invention, what we claim therein as new, and desire to secure by Letters Patent, is

A carding-machine tooth having its points compressed from the ends back to or about to the bend b b, so as to present an edge in front, and its body or crown cylindrical, substantially as and for the purpose set forth.

CHARLES HINDLE. JOHN G. MILTON. OLIVER ARNOLD.

Witnesses PETER DUNN, SAML- GATES. 

